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Magnetic Solitons in a Binary Bose-Einstein Condensate

Chunlei Qu, Lev P. Pitaevskii, and Sandro Stringari
Phys. Rev. Lett. 116, 160402 – Published 20 April 2016

Abstract

We study solitary waves of polarization (magnetic solitons) in a two-component Bose gas with slightly unequal repulsive intra- and interspin interactions. In experimentally relevant conditions we obtain an analytical solution which reveals that the width and the velocity of magnetic solitons are explicitly related to the spin healing length and the spin sound velocity of the Bose mixture, respectively. We calculate the profiles, the energy, and the effective mass of the solitons in the absence of external fields and investigate their oscillation in a harmonic trap where the oscillation period is calculated as a function of the oscillation amplitude. The stability of magnetic solitons in two dimensions and the conditions for their experimental observation are also briefly discussed.

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  • Received 19 February 2016

DOI:https://doi.org/10.1103/PhysRevLett.116.160402

© 2016 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

Chunlei Qu1, Lev P. Pitaevskii1,2, and Sandro Stringari1

  • 1INO-CNR BEC Center and Dipartimento di Fisica, Università di Trento, 38123 Povo, Italy
  • 2Kapitza Institute for Physical Problems RAS, Kosygina 2, 119334 Moscow, Russia

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Issue

Vol. 116, Iss. 16 — 22 April 2016

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